# SDR ASAA2025060258800

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 2, 2025
- Submitted: June 18, 2025
- Operation: Air carrier
- Aircraft: [N264AK](https://openairdocs.org/aircraft/N264AK), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36360
- Aircraft time: 31,500 hours, 10,248 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Web
- Part number: 146A8123U6
- Condition: Corroded
- Location: Zone 100
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2025060258800

## Discrepancy

AFT CARGO DOOR THRESHOLD HAS CORROSION, 3" FROM EDGE OF DOOR EDGE. GROUNDED - YES. BLENDED OUT DAMAGE AT AFT CARGO DOOR THRESHOLD. ORIGINAL MATERIAL THICKNESS IS .050, MATERIAL REMOVED IS .010, REMAINING MAT IS .040 FOUND TO BE OUT OF LIMITS IAW B737-900ER SRM 53-60-15-1A-1 AND B737-900ER SRM 53-60-15-01-1. REMOVED AND INSTALLED A NEW AFT CARGO DOOR THRESHOLD PN# 146A8123U6 PO:0 IAW BOEING DWG# 146A8120 REV A AND B737-900ER SRM 51-40-02 AND BOEING DWG #146A8340 REV-.

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